|Publication number||US4411545 A|
|Application number||US 06/353,897|
|Publication date||Oct 25, 1983|
|Filing date||Mar 2, 1982|
|Priority date||Mar 6, 1981|
|Also published as||CA1178815A1, DE3261414D1, EP0060757A1, EP0060757B1|
|Publication number||06353897, 353897, US 4411545 A, US 4411545A, US-A-4411545, US4411545 A, US4411545A|
|Original Assignee||Skf Compagnie D'applications Mecaniques - Adr|
|Export Citation||BiBTeX, EndNote, RefMan|
|Patent Citations (8), Referenced by (23), Classifications (8), Legal Events (5)|
|External Links: USPTO, USPTO Assignment, Espacenet|
The present invention relates to a swivel joint.
A swivel joint comprises an outer ring having a cavity in the form of a portion of sphere, and an inner ring whose form is partly spherical and which is housed in the spherical cavity of the outer ring.
Various solutions have been proposed for assembling the inner ring in the cavity of the outer ring. In certain swivel joints, the outer ring is split, this enabling it to be opened elastically and making it possible to introduce the inner ring therein. In other swivel joints, the outer ring is pressed on the inner ring. It is also possible to constitute the swivel joint with the aid of several pieces added together, assembled by a band or by wilding.
Swivel joints are also known in which the cavity of the outer ring presents two diametrically opposite notches in part of its thickness, the diameter of these notches being equal to the diameter of the inner ring and their width being equal to that of this ring. It is possible to place the inner ring in position by orienting it through 90° with respect to its normal position; it then suffices to pivot the inner ring to return it to its correct orientation.
However, these swivel joints present drawbacks which limit their domains of application; in particular, they can hardly be used when the swivel joint is subjected to a high radial load or to an axial load. In the case of a swivel joint with conventional notches, for example, these notches considerably reduce the surface of contact of the two rings and the resulting concentration of the efforts on the remaining surface brings about rapid deterioration of the swivel joint.
U.S. Pat. No. 3,007,747 relates to a swivel joint whose inner ring comprises a series of relatively narrow notches defining radial annular ribs, whilst its outer ring presents a series of notches allowing passage of the annular ribs of the inner ring. However, this swivel joint is even less resistant to an axial load, particularly due to the thinness of the ribs which may bend under the effect of this load.
It is an object of the present invention to provide an improved swivel joint which can withstand considerable axial and/or radial loads.
This swivel joint is of the type in which the cavity of the outer ring presents diametrically opposite notches in a part of its thickness, and is characterised in that the inner ring presents only two diametrically opposite notches disposed substantially in the median plane perpendicular to the axis of the ring and in that the outer ring presents only two pairs of notches whose width is equal, to within the clearance, to the width of the parts of the inner ring which flank the notches, the two notches of the same pair being spaced from each other by a distance equal, to within the clearance, to the width of the notches of the inner ring.
FIG. 1 is a view in elevation of the swivel joint.
FIG. 2 is a section thereof along II--II of FIG. 1.
FIG. 3 is a plan view of the inner ring.
FIG. 4 is a view in perspective showing the positioning of the inner ring of the swivel joint in the outer ring thereof.
FIG. 5 is a view in axial section through the swivel joint, during such positioning.
FIG. 6 is a section along VI--VI of FIG. 5.
Referring now to the drawings, the swivel joint according to the invention comprises an outer ring 1 and an inner ring 2.
The inner ring 2 is externally in the form of a truncated sphere and comprises two notches 3 which are diametrically opposite and disposed substantially in the median plane perpendicular to the ring; their width, as may be seen in particular in FIG. 6, is at least equal to 40% of the thickness of the outer ring 1 and at the most equal to 80% of the thickness of the inner ring. The outer ring 1 presents a cavity 4 in the form of a portion of sphere, the radius thereof being equal, to within the clearance, to that of the ring 2; it comprises two pairs of notches 5a and 5b which are diametrically opposite and which extend in substantially half the thickness of the ring. The bottom of each of these notches is cylindrical, with a radius slightly greater than that of the inner ring 2. These notches have a width slightly greater than those of parts 2a of the ring 2 which flank the notches 3 and each notch 2a is spaced from the adjacent notch 2b by a distance slightly greater than the width of these notches.
To position the inner ring 2 in the ring 1, the ring 2 is pivoted through 90° from its normal position, as shown in FIG. 4, and is fitted in the face of the ring 1 in which the notches 5a and 5b are located. During this manoeuvre, the parts 1a of the ring 1 located between the notches 5a and 5b engage in the notches 3 at the same time as the parts 2a of the ring 2 engage in the notches 5a and 5b (cf. FIG. 6). At the end of movement, the axis of the ring 2 is in the plane of the ring 1, as shown in FIG. 5. It then suffices to pivot the inner ring 2 to return it to its normal position (FIG. 2); this ring can now no longer escape from the outer ring.
When the swivel joint is subjected to a load which, in FIG. 1, is vertical and directed downwardly, this load is supported without difficulty by part 1a of the outer ring 1. If the direction of the load is oblique and passes through a notch 5a or 5b, this load is also very well supported by the joint due to the small width of the notch. The joint may generally withstand greater radial and/or axial loads than conventional swivel joints do.
It is obvious that the invention must not be considered as being limited to the embodiment described and shown, but covers, on the contrary, all the variants thereof.
|Cited Patent||Filing date||Publication date||Applicant||Title|
|US2047885 *||Jan 31, 1934||Jul 14, 1936||Riebe August||Journal bearing|
|US3007747 *||Feb 18, 1960||Nov 7, 1961||Isler William||Universal bearing|
|US3174811 *||Feb 17, 1961||Mar 23, 1965||Roller Bearing Co Of America||Ball and socket bearing|
|US3365249 *||Sep 17, 1965||Jan 23, 1968||Heim Universal Corp||Spherical bearing|
|US3586358 *||Jul 23, 1969||Jun 22, 1971||Licentia Gmbh||Bearing chuck|
|US3589779 *||Nov 24, 1969||Jun 29, 1971||Rex Chainbelt Inc||Sealed loader slot bearing|
|US3803685 *||Mar 29, 1972||Apr 16, 1974||Tuthill Pump Co||Ball joint and method of fabrication|
|GB554879A *||Title not available|
|Citing Patent||Filing date||Publication date||Applicant||Title|
|US4494027 *||May 18, 1984||Jan 15, 1985||General Electric Company||Dynamoelectric machine with self-adjusting bearing|
|US5005991 *||Dec 4, 1987||Apr 9, 1991||United Technologies Corporation||Spherical bearing link|
|US5486174 *||Feb 23, 1994||Jan 23, 1996||Soprane S.A.||Fastener for the osteosynthesis of the spinal column|
|US5494357 *||Oct 19, 1994||Feb 27, 1996||Rexnord Corporation||Process for making a replaceable socket for a ball and socket bearing and the replacement socket made thereby|
|US5524987 *||Dec 20, 1993||Jun 11, 1996||Rexnord Corporation||Plugged slotted entry bearing|
|US5722296 *||Sep 29, 1995||Mar 3, 1998||Kabushiki Kaisha Atsumitec||Change device for transmission|
|US6234961||Apr 15, 1999||May 22, 2001||Pineridge Holding Pty. Ltd.||Ball and socket interconnection and retractor assembly employing the same|
|US6764406 *||Oct 12, 2001||Jul 20, 2004||Delphi Technologies, Inc.||Constant velocity joint of tripod type|
|US7073950||Oct 7, 2002||Jul 11, 2006||Skf Industrie S.P.A.||Locking device for a wheel hub bearing|
|US7938451||Apr 19, 2007||May 10, 2011||Taimi R&D Inc.||Multifunctionally swivelling coupling assembly for fluid lines|
|US8114158||Jul 8, 2008||Feb 14, 2012||Kspine, Inc.||Facet device and method|
|US8162979||Jun 5, 2008||Apr 24, 2012||K Spine, Inc.||Medical device and method to correct deformity|
|US8337087 *||Jun 11, 2010||Dec 25, 2012||Skf Aerospace||Mechanical joint assembly and a method of assembling such an assembly|
|US8357182||Mar 26, 2009||Jan 22, 2013||Kspine, Inc.||Alignment system with longitudinal support features|
|US8357183||Jan 22, 2013||Kspine, Inc.||Semi-constrained anchoring system|
|US8506604 *||Nov 28, 2011||Aug 13, 2013||Rachiotek, Llc||Method for stabilizing a spinal segment|
|US8518086||Jun 17, 2010||Aug 27, 2013||K Spine, Inc.||Semi-constrained anchoring system|
|US8828058||Sep 1, 2010||Sep 9, 2014||Kspine, Inc.||Growth directed vertebral fixation system with distractible connector(s) and apical control|
|US8876390||Dec 14, 2012||Nov 4, 2014||Roller Bearing Company Of America, Inc.||Slotted bearings with wear-resistant treatments for gearbox mounting in a geared turbofan engine|
|US8920472||Apr 18, 2013||Dec 30, 2014||Kspine, Inc.||Spinal correction and secondary stabilization|
|US9011491||Jan 9, 2012||Apr 21, 2015||K Spine, Inc.||Facet device and method|
|US20110023283 *||Jun 11, 2010||Feb 3, 2011||Skf Aerospace France||Mechanical joint assembly and a method of assembling such an assembly|
|US20120253404 *||Nov 28, 2011||Oct 4, 2012||Rachiotek, Llc||Method for stabilizing a spinal segment|
|U.S. Classification||403/12, 403/122, 384/208|
|Cooperative Classification||Y10T403/32631, Y10T403/1608, F16C11/0614|
|Jun 9, 1982||AS||Assignment|
Owner name: SKF COMPAGNIE D APPLICATIONS MECANIQUES- ADR; SINT
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:ROBERGE, GERARD;REEL/FRAME:004000/0044
Effective date: 19820223
Owner name: SKF COMPAGNIE D APPLICATIONS MECANIQUES- ADR; A CO
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:ROBERGE, GERARD;REEL/FRAME:004000/0044
Effective date: 19820223
|Nov 25, 1986||FPAY||Fee payment|
Year of fee payment: 4
|Jun 4, 1991||REMI||Maintenance fee reminder mailed|
|Oct 27, 1991||LAPS||Lapse for failure to pay maintenance fees|
|Jan 7, 1992||FP||Expired due to failure to pay maintenance fee|
Effective date: 19911027